Li Dajian, Zheng Yuhong, Zhang Zhanxiang, Zhang Qi, Huang Xiaoying, Dong Renfeng, Cai Yuepeng, Wang Lin
School of Chemistry, South China Normal University, Guangzhou, China.
State Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin, China.
Front Bioeng Biotechnol. 2022 Feb 14;10:844328. doi: 10.3389/fbioe.2022.844328. eCollection 2022.
Multimode stimuli-regulated propulsions are extremely useful for artificial micro-/nanomotors in performing specialized tasks in different microscopic environments. However, it is still a great challenge to develop a simple and efficient micro/nanosystem which can operate in complicated environments, either with fuel or without fuel. Here, we report a novel hybrid micromotor which only needs one metal with a special structure: micro-spherical shell with a hole. Since we attractively combine the inherently catalytic properties of Pt for chemical propulsion with a designed concave structure for acoustic propulsion, the micromotors can not only move rapidly in HO fueled environment due to the chemical reaction between Pt and HO but also can exhibit excellent acoustic propulsion in a fuel-free environment due to the non-uniform stress caused by ultrasound. In addition, the attractive group motion behavior of the motors, including aggregation, group migration, and dispersion, is easily realized by acoustic field regulation. The brand-new single-metal hybrid micromotors with a dual driving mode, flexible propulsion regulation, and efficient group motion regulation, which are essential for making micro-/nanomotors compatible with different surrounding environments, are expected to advance the field of artificial nanomachines.
多模式刺激调节推进对于人工微纳马达在不同微观环境中执行特定任务极为有用。然而，开发一种能够在复杂环境中运行的简单高效的微纳系统仍然是一项巨大挑战，无论该环境是否有燃料。在此，我们报道了一种新型混合微马达，它只需要一种具有特殊结构的金属：带孔的微球壳。由于我们将铂用于化学推进的固有催化特性与用于声推进的设计凹面结构巧妙结合，这些微马达不仅能因铂与过氧化氢之间的化学反应而在过氧化氢燃料环境中快速移动，还能因超声引起的应力不均匀而在无燃料环境中展现出出色的声推进性能。此外，通过声场调节可轻松实现马达引人注目的集体运动行为，包括聚集、集体迁移和分散。这种具有双驱动模式、灵活推进调节和高效集体运动调节的全新单金属混合微马达，对于使微纳马达与不同周围环境兼容至关重要，有望推动人工纳米机器领域的发展。
